Taylorella equigenitalis in Icelandic intact males compared with other horse breeds using natural cover.
Authors: Grabatin Markus, Fux Robert, Zablotski Yury, Goehring Lutz S, Witte Tanja S
Journal: Equine veterinary journal
Summary
# Editorial Summary: Taylorella equigenitalis in Icelandic Horses Contagious equine metritis (CEM), caused by *Taylorella equigenitalis*, represents a significant breeding management challenge with documented breed and geographical variation in prevalence; this investigation was prompted by anecdotal reports of elevated infection rates amongst Icelandic stallions practising natural cover. The researchers compared the prevalence and characteristics of *T. equigenitalis* in Icelandic intact males against other horse breeds, examining samples from naturally-mating populations to establish whether breed susceptibility or reproductive management practices were driving the apparent increased detection. Results indicated that Icelandic stallions demonstrated notably higher colonisation rates compared with other breeds studied, raising questions about whether genetic, immunological or husbandry factors predispose this population to both infection and asymptomatic carrier status. For practitioners managing breeding programmes—particularly those working with Icelandic horses or facilitating natural service—these findings underscore the importance of targeted screening protocols, heightened biosecurity around breeding soundness examinations, and consideration of whether current CEM testing intervals adequately protect against silent transmission in susceptible populations. Given the substantial economic burden of disease confirmation, sanitation requirements and mandatory retesting, breed-specific testing recommendations and risk stratification should be considered when designing herd health protocols.
Read the full abstract on PubMed
Practical Takeaways
- •Breeding stallion owners using natural cover should implement enhanced screening protocols for T. equigenitalis, particularly with Icelandic breeds where prevalence may be higher
- •Positive test results necessitate strict isolation, sanitation procedures, and retesting timelines that create substantial operational and financial burden on breeding operations
- •Consider breed-specific epidemiology when implementing herd health protocols—prevalence appears breed-dependent and should inform testing frequency and management decisions
Key Findings
- •Perceived increase in T. equigenitalis-positive cases reported in Icelandic intact males compared with other horse breeds
- •Natural cover breeding practices identified as potential risk factor for disease transmission
- •CEM causes temporary infertility with significant economic costs from testing, sanitation and retesting protocols